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/* Jump to a new context powerpc32 common.
Copyright (C) 2005-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* This is the common implementation of setcontext for powerpc32.
It not complete in itself should be included in to a framework that
defines:
__CONTEXT_FUNC_NAME
and if appropriate:
__CONTEXT_ENABLE_FPRS
__CONTEXT_ENABLE_VRS
Any architecture that implements the Vector unit is assumed to also
implement the floating unit. */
/* Stack frame offsets. */
#define _FRAME_BACKCHAIN 0
#define _FRAME_LR_SAVE 4
#define _FRAME_PARM_SAVE1 8
#define _FRAME_PARM_SAVE2 12
#define _FRAME_PARM_SAVE3 16
#define _FRAME_PARM_SAVE4 20
#ifdef __CONTEXT_ENABLE_VRS
.machine "altivec"
#endif
ENTRY(__CONTEXT_FUNC_NAME)
mflr r0
stwu r1,-16(r1)
cfi_adjust_cfa_offset (16)
stw r0,20(r1)
cfi_offset (lr, _FRAME_LR_SAVE)
stw r31,12(r1)
cfi_offset(r31,-4)
lwz r31,_UC_REGS_PTR(r3)
/* Restore the signal mask */
li r5,0
addi r4,r3,_UC_SIGMASK
li r3,SIG_SETMASK
bl __sigprocmask@local
cmpwi r3,0
bne 3f /* L(error_exit) */
#ifdef PIC
mflr r8
# define got_label GENERATE_GOT_LABEL (__CONTEXT_FUNC_NAME)
SETUP_GOT_ACCESS(r7,got_label)
addis r7,r7,_GLOBAL_OFFSET_TABLE_-got_label@ha
addi r7,r7,_GLOBAL_OFFSET_TABLE_-got_label@l
# ifdef SHARED
lwz r7,_rtld_global_ro@got(r7)
mtlr r8
lwz r7,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+LOWORD(r7)
# else
lwz r7,_dl_hwcap@got(r7)
mtlr r8
lwz r7,LOWORD(r7)
# endif
#else
lis r7,(_dl_hwcap+LOWORD)@ha
lwz r7,(_dl_hwcap+LOWORD)@l(r7)
#endif
#ifdef __CONTEXT_ENABLE_FPRS
# ifdef __CONTEXT_ENABLE_VRS
andis. r6,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16)
la r10,(_UC_VREGS)(r31)
beq 2f /* L(has_no_vec) */
lwz r0,(32*16)(r10)
li r9,(32*16)
cmpwi r0,0
mtspr VRSAVE,r0
beq 2f /* L(has_no_vec) */
lvx v19,r9,r10
la r9,(16)(r10)
lvx v0,0,r10
lvx v1,0,r9
addi r10,r10,32
addi r9,r9,32
mtvscr v19
lvx v2,0,r10
lvx v3,0,r9
addi r10,r10,32
addi r9,r9,32
lvx v4,0,r10
lvx v5,0,r9
addi r10,r10,32
addi r9,r9,32
lvx v6,0,r10
lvx v7,0,r9
addi r10,r10,32
addi r9,r9,32
lvx v8,0,r10
lvx v9,0,r9
addi r10,r10,32
addi r9,r9,32
lvx v10,0,r10
lvx v11,0,r9
addi r10,r10,32
addi r9,r9,32
lvx v12,0,r10
lvx v13,0,r9
addi r10,r10,32
addi r9,r9,32
lvx v14,0,r10
lvx v15,0,r9
addi r10,r10,32
addi r9,r9,32
lvx v16,0,r10
lvx v17,0,r9
addi r10,r10,32
addi r9,r9,32
lvx v18,0,r10
lvx v19,0,r9
addi r10,r10,32
addi r9,
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